Water-soluble metal-processing agent, coolant, method for preparation of the coolant, method for prevention of microbial deterioration of water-soluble metal-processing agent, and metal processing
AssigneeYushiro Chemical Industry Co., Ltd.
InventorsToru Kadokawa, Akio Saito
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Abstract
Disclosed are a water-soluble metal-processing agent and a coolant both of which have excellent microbial deterioration resistance and are less likely to go rotten, a method for preparing the agent or the coolant, and a metal processing method. The water-soluble metal-processing agent or the coolant comprises an N,N,N′,N′-tetraalkyldiamine compound. The metal processing method is characterized by processing a metal of interest by using the water-soluble metal-processing agent or the coolant.
Claims13
A water-soluble metal-processing composition comprising an N,N,N′,N′-tetraalkyldiamine compound represented by the following formula (1), and dodecanedioic acid,
- wherein each of R1, R2, R3 and R4 represents an alkyl group having 1 to 12 carbon atoms, and R1, R2, R3 and R4 may be the same group or different groups and wherein R5 is a divalent organic group.
A coolant, comprising:
- dodecanedioic acid and an N,N,N′,N′-tetraalkyldiamine compound represented by the following formula (1), which is present in an amount of 0.01% or more by weight based on 100% by weight of the total amount of said coolant
- wherein each of R1, R2, R3 and R4 represents an alkyl group having 1 to 12 carbon atoms, and R1, R2, R3 and R4 may be the same group or different groups and wherein R5 is a divalent organic group.
A method for the prevention of microbial deterioration of a water-soluble metal-processing agent, comprising:
- adding an N,N,N′,N′-tetraalkyldiamine compound represented by the following formula (1) and dodecanedioic acid to a water-soluble metal-processing agent
- wherein each of R1, R2, R3 and R4 represents an alkyl group having 1 to 12 carbon atoms, and R1, R2, R3 and R4 may be the same group or different groups and wherein R5 is a divalent organic group.
Dependencies are inferred from the claim text.